﻿using System;
using System.Collections.Generic;

class Dictionary
{
    static void Main()
    {
        Dictionary<string, string> dictionary = new Dictionary<string, string>()
        {
            { ".NET", "platform for applications from Microsoft" },
            { "CLR", "managed execution environment for .NET" },
            { "namespace", "hierarchical organization of classes" },
        };

        string word = ".NET";

        if (dictionary.ContainsKey(word))
        {
            Console.WriteLine(dictionary[word]);
        }
    }
}